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Overview

Comprehensive Description

Biology

Oceanic, mesopelagic with adults and juveniles at 200-800 m by day and 100 (sometimes shallower)-600 m by night, pre-metamorphic larvae at 100-300 m. Adults and juveniles make short diel vertical migrations. Dioecious, adult photophore complement acquired at about 16-17 mm SL (Ref. 4739). Feeds on crustaceans and small fishes (Ref. 35388).
  • Quéro, J.-C., J.C. Njock and M.M. de la Hoz 1990 Sternoptychidae. p. 275-282. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4462)   http://www.fishbase.org/references/FBRefSummary.php?id=4462&speccode=40 External link.
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References

Baird RC. 1971. The Systematics, Distribution, and Zoogeography of the Marine Hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zooology 142(1):1–128.

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Data on Catalog of Fishes

View data on Catalog of Fishes here.

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Type locality

Atlantic southeast of Cape of Good Hope, South Africa.

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Type specimen(s)

Holotype: MNHN 0000-1889.

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Main Reference

Baird RC. 1971. The Systematics, Distribution, and Zoogeography of the Marine Hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zooology 142(1):1–128.

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Description

Dorsal-fin rays 9; anal-fin rays 12; pectoral-fin rays 10–11; total gill rakers (rarely 15) 16–17; vertebrae 36–37(rarely 38). Large species, often exceeding 70 mm SL; body deep, depth at end of dorsal usually more than 1.5 times into SL; first preanal photophore with pointed dorsal margin: dorsal spine high, its height nearly one-half its length; post-temporal spines well developed; postabdominal spines nearly equal, anteriormost spine curves smoothly forward; lower preopercle spine long, curving forward, upper very short; jaws large; teeth recurved with two large canines in lower jaw and a somewhat smaller pair in the upper jaw; pigment diffuse over whole of trunk; no marked midline pigment spots; less marked concentration of pigment in caudal peduncle; dark pigment present on outermost caudal rays (this often lost in handling) .

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Distribution

Eastern Atlantic: southern Iceland to Canary Islands and Cape of Good Hope, South Africa. South Pacific: between 30°S and 50°S.
  • Quéro, J.-C., J.C. Njock and M.M. de la Hoz 1990 Sternoptychidae. p. 275-282. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4462)   http://www.fishbase.org/references/FBRefSummary.php?id=4462&speccode=40 External link.
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Restricted to the northeast Atlantic between latitudes 35°N and 65°N and east of longitude 35°W; occurs in a broad swath and across the southern Pacific between 30˚ S and 50˚S from Chile to New Zealand; reported southwest of the Cape of Good Hope suggesting a bipolar distribution in the Atlantic; not reported from the North Pacific or southern Indian Ocean.

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Eastern North Atlantic north of 30°N, South Pacific south of 30°S.
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Physical Description

Size

Maximum size: 85 mm NG
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Max. size

9.0 cm TL (male/unsexed; (Ref. 27000))
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To at least 70 mm SL.

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Diagnostic Description

Lower opercular spine downward and curved forward. Upper opercular spine short, directed outward. Ventral line of abdominal keel usually with a concave notch in front of anterior postabdominal spine (Ref. 37473).
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Differs from A. aculeatus by absence of subcaudal spines, less deep body, lower dorsal spine, higher vertebral count and postabdominal spine characteristics; differs from A. affinis by presence of enlarged canines, lighter pigment, no subcaudal spines, preopercle and post-temporal spine characteristics and first anal photophore; differs from A. sladeni hy presence of enlarged canines; no definite pigmented midline; deeper body, spine characteristics, anal photophores, and lower gill-raker count.

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Ecology

Habitat

Known from seamounts and knolls
  • Stocks, K. 2009. Seamounts Online: an online information system for seamount biology. Version 2009-1. World Wide Web electronic publication.
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Environment

bathypelagic; oceanodromous (Ref. 51243); marine; depth range 100 - 800 m (Ref. 4739)
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Depth range based on 117 specimens in 1 taxon.
Water temperature and chemistry ranges based on 98 samples.

Environmental ranges
  Depth range (m): 38 - 4900
  Temperature range (°C): 1.785 - 16.385
  Nitrate (umol/L): 5.668 - 44.278
  Salinity (PPS): 31.839 - 36.159
  Oxygen (ml/l): 0.689 - 6.416
  Phosphate (umol/l): 0.443 - 3.220
  Silicate (umol/l): 2.068 - 163.066

Graphical representation

Depth range (m): 38 - 4900

Temperature range (°C): 1.785 - 16.385

Nitrate (umol/L): 5.668 - 44.278

Salinity (PPS): 31.839 - 36.159

Oxygen (ml/l): 0.689 - 6.416

Phosphate (umol/l): 0.443 - 3.220

Silicate (umol/l): 2.068 - 163.066
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 100 - 800m.
From 100 to 800 meters.

Habitat: bathypelagic.
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Migration

Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.
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Trophic Strategy

Oceanic, mesopelagic with adults and juveniles at 200-800 m by day and 100 (sometimes shallower)-600 m by night, pre-metamorphic larvae at 100-300 m. Feeds on crustaceans and small fishes.
  • Quéro, J.-C., J.C. Njock and M.M. de la Hoz 1990 Sternoptychidae. p. 275-282. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4462)   http://www.fishbase.org/references/FBRefSummary.php?id=4462&speccode=40 External link.
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General Ecology

Ecology

Data variable by day with relatively low concentrations from 200 m to 750 m; by night depths are concentrated between 200 m and 450 m with most records from 180 m to 300 m.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Argyropelecus olfersii

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 6
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
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